Combined removal device and method for sulphur, mercury and nitrate in smoke

A combined removal and flue gas technology, applied in the combined removal of nitrate, sulfur in flue gas, and mercury fields, can solve the problems of mercury elements not being recycled, high cost, and weakened economy, so as to reduce investment costs, The effect of reducing consumption and reducing operating costs
CN102824843BActive Publication Date: 2014-07-02XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2014-07-02

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Abstract

Disclosed are combined removal device and method for sulphur, mercury and nitrate in smoke. The device comprises a sulphur removal system, a combined mercury-nitrate removal system, a mercury ion recovery system, an elementary mercury recovery system, and an oxidant regeneration system. The sulphur removal system is disposed on the lower portion of a column. The combined mercury-nitrate removal system is disposed on the upper portion of the column. The mercury ion recovery system is connected with the bottom of the sulphur removal system. The elementary mercury recovery system is connected with the combined mercury-nitrate removal system. The oxidant regeneration system is connected with the elementary mercury recovery system. The removal method includes smoke purification, mercury atom recovery and chlorine atom recycling. The removal device and method have the advantages that the structure is simple, integrity is high, operational cost is low, materials are recycled, and byproducts can be recycled.
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Description

technical field

[0001] The invention belongs to the technical field of flue gas purification, and in particular relates to a combined removal device for sulfur, mercury and nitrate in flue gas and a removal method thereof. Background technique

[0002] Sulfur, mercury and nitrate are the main pollutants in the flue gas of power station boilers. Sulfur and nitrate form acid rain, and mercury is a highly toxic heavy metal element. The environmental and health problems caused by these pollutants are increasingly affecting the sustainable development of the national economy and human health.

[0003] The current mainstream desulfurization technology is limestone gypsum wet flue gas desulfurization (WFGD), which has mature technology, high removal efficiency and reliable process. Hg in the air 2+ (g) and NO 2 , but does not absorb NO and Hg 0 (g), so far from NO x and Hg control requirements. The main denitration method at this stage is selective catalytic reduction (SCR)....

Claims

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